<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div>
        <a href="a.html">a</a>
        <a href="b.html">b</a>
        <a href="c.html">c</a>
        <a href="d.html">d</a>
        <a href="e.html">e</a>
    </div>
    <input type="button" name="box" value="前进" onclick="history.back()">
    <input type="button" name="box1" value="后退" onclick="history.forward()">
    <h2>c</h2>

</body>
</html>